LCD Display Monitor Problem

Laptop Screen Dim, Blank Or Black

Note that these steps correspond with decision points on the flowchart and are reached through the interactive diamond symbols. The text below cannot be read sequentially.

Do you see a live BIOS splash screen? Most laptops will display a manufacturer splash screen with their brand name, Lenovo, Toshiba, Acer, Sony, etc, before launching into windows. Even those that dont should flash a text screen with the BIOS maker (AMI, Award, Phoenix) in the corner, and a message telling you what key combination to use to access the BIOS Setup screens. A biometric screen prompting you to scan a fingerprint before the system will boot counts as a BIOS splash screen here. If the screen lights up with anything, a graphic or text, it means that the basic display I/O system is functioning.

Return to Diagnostic Chart

Is the screen live if you connect an external display? All notebooks should support an external monitor, usually with a high-density D-Shell 15 pin VGA connector, but some might feature a DVI connector instead. Its a vital part of laptop display troubleshooting to determine if a known good external monitor can be used. Newer laptops dont keep the external connector live by default, and some dont allow for simultaneous display on both the LCD and an external monitor. You can toggle between the notebook screen (which isnt working) and the external display with an Fn key combination. The Fn key is located at the lower left of the keyboard, normally between the CTRL and the ALT key. Toshiba uses Fn-F5 to toggle between the laptop LCD and an external display. IBM or Lenovo uses FN-F7, Acer varies with the model, using Fn-F5, Fn-F3, Fn-F8, Sony Fn-F7, Lenovo Fn-F8, HP or Compaq, Fn-F4. There are variations with the age of the laptop and not all manufacturers have standardized on a key combo across the whole range, but you can usually figure it out from the little graphics on the function keys that line the top of the keyboard.

Return to Diagnostic Chart

Can you hear any sound from the hard drive or fans? If you cant get any life at all on the laptop lcd or the external display, its entirely possible that the problem goes deeper than a video issue. Signs of life include the cooling fan blowing, the hard drive spinning up, any LED activity beyond the LED indicating AC power is attached or battery charging. If the system is powering up, even going through boot as you can often tell by the level of hard drive activity demonstrated by the sound or the hard drive LED flashing, with no life on the LCD or external monitor, you have a board level failure. It could be the video processor failed due to overheating, you can try taking apart and reassembling the laptop body on the chance there is a bus connector failure (its only a possibility on some models), but you dont have to bother inspecting the wiring to to laptop screen or connections in the lid since the external monitor bypasses all of these.

Return to Diagnostic Chart

Do you see a very dim desktop image? Can you see a ghost-like image of your desktop that is functional, ie, one that changes if you drag an icon, launch a program or disappears if you shut down. Standard LCDs produce very little visible light on their own, they require the Cold Cathode Fluorescent Light (CCFL) to light the screen from behind. The fluorescent tube is normally located at the top of the screen, and a bright reflective surface distributes the light across the back of the LCD, so it can shine through the liquid crystals of the liquid crystal display, which only transmit red, green or blue (RGB).
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Note: Not for UEFI systems

So your Windows 7 PC System no longer boots and you are getting the "...An error occurred while attempting to read the boot configuration data." system error. You have reached the point that all suggestions on startup repair have failed and you may now have to re-create a clean boot configuration data (BCD) file. The following information on creating a clean, fresh BCD file maybe helpful to you.

We are going to use a system command called BCDedit to re-create the BCD file.

Introduction
BCDedit is a really powerful tool that Windows 7 and Windows Vista uses to manage the boot loader entries.

BCDEDIT needs a boot loader file to boot your system.

A boot loader is a file that contains necessary information that instruct the system how to boot/start an operating system.
• Windows 7 and Vista bootloader file is ootmgr
• Windows XP bootloader file is tldr

Bcdedit edits a file called BCD, which is located in Windows 7s hidden partition under C: ootBCD.

NOTE: Before performing any changes to your system, please make sure you have a backup of system and personal data files. A backup is essential if things go wrong, when you are making changes to your system.

How to Create a Clean BCD file:
Put your Windows 7 DVD in the drive and restart your PC. Assuming youve properly configured your BIOS to boot from CDs/DVDs before hard drives, you should get a prompt asking you to "Press any key to boot from the CD/DVD..."
Go ahead and press any key.
In the next window, select "Repair your computer" to continue.
On the next window, choose the Windows 7 installation that youd like to perform the repair on.
Click the Next button.
Proceed with the process by choosing "Command Prompt" from this list [Image below]. We could select the "Startup Repair" to fix the boot problem, but we are assuming that you already tried this option and it did not work.
In the Command Prompt window we shall perform a number of commands to create the new BCD file.



Note: Were assuming that the boot drive is drive C: below. If your computer is configured differently, be sure to use the appropriate drive letter here instead. Each command shown below is separated by a newline for display purposes only. So, command and its switches must be on the same line.

Enter the following commands:

bootrec.exe /fixmbr
X: oot ootsect.exe /nt60 all /force

Replace X in the command line above with the device letter to the CD/DVD drive that is running your Windows 7 Recovery Disk.

Now remove the old BCD registry, and create a new one instead.

del C: oot cd

bcdedit /createstore c: oot cd.tmp

bcdedit.exe /store c: oot cd.tmp /create {bootmgr} /d "Windows Boot Manager"

bcdedit.exe /import c: oot cd.tmp

bcdedit.exe /set {bootmgr} device partition=C:

bcdedit.exe /timeout 12

del c: oot cd.tmp

Now we have a clean, working Win 7 bootloader. But we need to add a Win 7 entry to it:

bcdedit.exe /create /d "Windows 7" /application osloader

bcdedit.exe should return a message with a GUID for the newly-created entry. It will look something like this:

The entry {fc8bcc18-8a93-11df-baf9-806e6f6e6963} was successfully created.

Youll need to use the value that bcdedit.exe returned for you below, along with the drive letter for the drive that Windows 7 is installed to:

bcdedit.exe /set {fc8bcc18-8a93-11df-baf9-806e6f6e6963} device partition=C:

bcdedit.exe /set {fc8bcc18-8a93-11df-baf9-806e6f6e6963} osdevice partition=C:

bcdedit.exe /set {fc8bcc18-8a93-11df-baf9-806e6f6e6963} path Windowssystem32winload.exe

bcdedit.exe /set {fc8bcc18-8a93-11df-baf9-806e6f6e6963} systemroot Windows

And, last of all, tell the Windows 7 bootloader to boot the new entry by default:

bcdedit.exe /displayorder {fc8bcc18-8a93-11df-baf9-806e6f6e6963}

bcdedit.exe /default {fc8bcc18-8a93-11df-baf9-806e6f6e6963}

Now the Windows 7 bootloader has been removed and rebuilt from scratch.

At this point, you have a clean and hopefully a fully-working bootloader with one entry for Windows 7.

Reboot your PC system to get back into Windows 7.

Enjoy!!!

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How to fix a Computer Software and Hardware: Hard disk not found:

Hard disk not found   Check/change ata/ide/sata cable. If your mother board old go to BIOS check BOOT options. Check/change hard disk p...

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How to repair and fix your hard drive from within Windows. Determine if there is a problem with the hard disk in the form of file system corruption or bad sectors (disk errors). Analyze or export this data to make an assessment about the condition of your hard drive. Examins the chkdsk utility and the Computer Management MMC console.

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